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United States Patent | 6,147,257 |
Allegrini ,   et al. | November 14, 2000 |
A process for the preparation of S-alkylcysteines of formula ##STR1## wherein R is a lower or branched C.sub.1 -C.sub.4 alkyl group; by S-alkylation of cysteines with dialkylcarbonates.
Inventors: | Allegrini; Pietro (Lonigo, IT); Barreca; Giuseppe (Caldiero, IT); Rossi; Elena (Cologna Veneta, IT) |
Assignee: | Zambon Group S.p.A. (Milan, IT) |
Appl. No.: | 243535 |
Filed: | February 3, 1999 |
Feb 04, 1998[IT] | MI98A0200 |
Current U.S. Class: | 562/557 |
Intern'l Class: | C07C 321/04 |
Field of Search: | 562/557 |
5644028 | Jul., 1997 | Mimoto et al. |
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